<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>
<body>
  <script>
        let arr=[2,6,1,77,52,25,7]
    let  max=arr[0]
      for (let i=1;i<arr.length;i++){
        if(arr[i]>max){
          max= arr[i]
        }
      }
        let min=arr[0]
          for (let i=1;i<arr.length;i++){
            if(arr[i]<min){
          min= arr[i]
        }
      }
    document.write(`数组中的最大值为：${max}<br>`)
    document.write(`数组中的最小值为：${min}`)
  </script>
</body>
</html>